ESTIMATION OF <I>Kansei</I> INFORMATION IN JUDGING COLORED WEIGHTS BY USING SHANNON'S INFORMATION THEORY
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A subjective weight sensation was able to express as a physical information quantity with the aid of the well-known Shannon's information theory in order to estimate <I>Kansei</I> information processing in weight perception of colored balls. The <I>Kansei</I> information for the weight sensation of colored balls is obtained from combinations of actions such as looking, hefting, hearing and so on. In the weight sensation, the contribution of the <I>Kansei</I> information got from each action was quantitatively analyzed by calculating the Shannon's information quantity.<BR>The experiment found that for all methods except H judgment subjects felt that colors with low reflectivity such as black and purple were heavier, whereas colors with high reflectivity such as white and yellow were lighter. It was also found that the absolute value of the perception of weight tended to be smaller when the subjects made their judgments as they held the balls.<BR>The differences among the different weight judgment conditions were expressed quantitatively by the amount of information communicated to perception. In I judgment, the information on the sensation of weight communicated was 0.60 bit, whereas it was reduced to 0.16 bit under I&H judgment. Similarly, the information communicated under L judgment was 0.43 bit, but was reduced to 0.12 bit under L&H judgment.<BR>The above findings suggested the possibility of quantitatively presenting any differences according to the number and combination of different senses involved in a judgment of weight, and controlling the perception of the weight of an object in virtual space through color and luster.
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